Regulated bi-directional DC-to-DC voltage converter which maintains a continuous input current during step-up conversion
First Claim
1. A bi-directional DC-to-DC voltage converter, which comprises:
- a boost sub-circuit having a positive input/output terminal and a negative input/output terminal;
a bridge sub-circuit having a positive input/output terminal and a negative input/output terminal, said negative input/output terminal being coupled to the negative input/output terminal of the boost sub-circuit;
a transformer having a primary and a secondary winding, said primary winding having a first terminal and a second terminal, said secondary winding having a first terminal, a second terminal, and a center-tap terminal;
a first filter capacitor coupling the positive and negative input/output terminals of said boost sub-circuit;
an inductor coupling the positive input/output terminal of said boost sub-circuit with the center-tap terminal of said transformer;
a first switching means interposed between the first terminal of said secondary winding and the negative input/output terminal of said boost sub-circuit;
a first rectifying means interposed between the first terminal of said secondary winding and the negative input/output terminal of said boost sub-circuit, and polarized so as to allow current to flow from the negative input/output terminal of said boost sub-circuit to the first terminal of said secondary winding;
a second switching means interposed between the second terminal of said secondary winding and the negative input/output terminal of said boost sub-circuit;
a second rectifying means interposed between the second terminal of said secondary winding and the negative input/output terminal of said boost sub-circuit, and polarized so as to allow current to flow from the negative input/output terminal of said boost sub-circuit to the second terminal of said secondary winding;
a third switching means interposed between the second terminal of said primary winding and the negative input/output terminal of said bridge sub-circuit;
a third rectifying means interposed between the second terminal of said primary winding and the negative input/output terminal of said bridge sub-circuit, and polarized so as to allow current to flow from the negative input/output terminal of said bridge sub-circuit to the second terminal of said primary winding;
a fourth switching means interposed between the second terminal of said primary winding and the positive input/output terminal of said bridge sub-circuit;
a fourth rectifying means interposed between the second terminal of said primary winding and the positive input/output terminal of said bridge sub-circuit, and polarized so as to allow current to flow from the second terminal of said primary winding to the positive input/output terminal of said bridge sub-circuit;
a fifth switching means interposed between the first terminal of said primary winding and the negative input/output terminal of said bridge sub-circuit;
a fifth rectifying means interposed between the first terminal of said primary winding and the negative input/output terminal of said bridge sub-circuit, and polarized so as to allow current to flow from the negative input/output terminal of said bridge sub-circuit to the first terminal of said primary winding;
a sixth switching means interposed between the first terminal of said primary winding and the positive input/output terminal of said bridge sub-circuit;
a sixth rectifying means interposed between the first terminal of said primary winding and the positive input/output terminal of said bridge sub-circuit, and polarized so as to allow current to flow from the first terminal of said primary winding to the positive input/output terminal of said bridge sub-circuit;
a second filter capacitor coupling the positive and negative input/output terminals of said bridge sub-circuit.
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Accused Products
Abstract
A pulse-width modulated, bi-directional DC-to-DC voltage converter having a regulated output, and capable of converting between a high-potential direct current voltage and a low-potential direct current voltage. The converter'"'"'s magnetic components, as well as several of its semiconductor rectifiers, perform dual functions (one in the step-up mode, and another in the step-down mode), which serves to minimize the total component count, and allows the converter to be both compact and lightweight. Additionally, as the converter maintains a continuous input current during voltage step-up conversion, the generation of signals which might cause electromagnetic interference is reduced.
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Citations
6 Claims
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1. A bi-directional DC-to-DC voltage converter, which comprises:
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a boost sub-circuit having a positive input/output terminal and a negative input/output terminal; a bridge sub-circuit having a positive input/output terminal and a negative input/output terminal, said negative input/output terminal being coupled to the negative input/output terminal of the boost sub-circuit; a transformer having a primary and a secondary winding, said primary winding having a first terminal and a second terminal, said secondary winding having a first terminal, a second terminal, and a center-tap terminal; a first filter capacitor coupling the positive and negative input/output terminals of said boost sub-circuit; an inductor coupling the positive input/output terminal of said boost sub-circuit with the center-tap terminal of said transformer; a first switching means interposed between the first terminal of said secondary winding and the negative input/output terminal of said boost sub-circuit; a first rectifying means interposed between the first terminal of said secondary winding and the negative input/output terminal of said boost sub-circuit, and polarized so as to allow current to flow from the negative input/output terminal of said boost sub-circuit to the first terminal of said secondary winding; a second switching means interposed between the second terminal of said secondary winding and the negative input/output terminal of said boost sub-circuit; a second rectifying means interposed between the second terminal of said secondary winding and the negative input/output terminal of said boost sub-circuit, and polarized so as to allow current to flow from the negative input/output terminal of said boost sub-circuit to the second terminal of said secondary winding; a third switching means interposed between the second terminal of said primary winding and the negative input/output terminal of said bridge sub-circuit; a third rectifying means interposed between the second terminal of said primary winding and the negative input/output terminal of said bridge sub-circuit, and polarized so as to allow current to flow from the negative input/output terminal of said bridge sub-circuit to the second terminal of said primary winding; a fourth switching means interposed between the second terminal of said primary winding and the positive input/output terminal of said bridge sub-circuit; a fourth rectifying means interposed between the second terminal of said primary winding and the positive input/output terminal of said bridge sub-circuit, and polarized so as to allow current to flow from the second terminal of said primary winding to the positive input/output terminal of said bridge sub-circuit; a fifth switching means interposed between the first terminal of said primary winding and the negative input/output terminal of said bridge sub-circuit; a fifth rectifying means interposed between the first terminal of said primary winding and the negative input/output terminal of said bridge sub-circuit, and polarized so as to allow current to flow from the negative input/output terminal of said bridge sub-circuit to the first terminal of said primary winding; a sixth switching means interposed between the first terminal of said primary winding and the positive input/output terminal of said bridge sub-circuit; a sixth rectifying means interposed between the first terminal of said primary winding and the positive input/output terminal of said bridge sub-circuit, and polarized so as to allow current to flow from the first terminal of said primary winding to the positive input/output terminal of said bridge sub-circuit; a second filter capacitor coupling the positive and negative input/output terminals of said bridge sub-circuit. - View Dependent Claims (2, 3)
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4. A bi-directional DC-to-DC voltage converter, which comprises:
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a boost sub-circuit having a positive input/output terminal and a negative input/output terminal; a bridge sub-circuit having a positive input/output terminal and a negative input/output terminal, said negative input/output terminal being coupled to the negative input/output terminal of the boost sub-circuit; a transformer having a primary and a secondary winding, said primary winding having a first terminal and a second terminal, said secondary winding having a first terminal, a second terminal, and a center-tap terminal; a first filter capacitor coupling the positive and negative input/output terminals of said boost sub-circuit; an inductor coupling the positive input/output terminal of said boost sub-circuit with the center-tap terminal of said transformer; a first bipolar transistor, the collector of which is coupled to the first terminal of said secondary winding, and the emitter of which is coupled to the negative input/output terminal of said boost sub-circuit; a first rectifying means interposed between the first terminal of said secondary winding and the negative input/output terminal of said boost sub-circuit, and polarized so as to allow current to flow from the negative input/output terminal of said boost sub-circuit to the first terminal of said secondary winding; a second bipolar transistor, the collector of which is coupled to the second terminal of said secondary winding, and the emitter of which is coupled to the negative input/output terminal of said boost sub-circuit; a second rectifying means interposed between the second terminal of said secondary winding and the negative input/output terminal of said boost sub-circuit, and polarized so as to allow current to flow from the negative input/output terminal of said boost sub-circuit to the second terminal of said secondary winding; a third bipolar transistor, the collector of which is coupled to the second terminal of said primary winding, and the emitter of which is coupled to the negative input/output terminal of said bridge sub-circuit; a third rectifying means interposed between the second terminal of said primary winding and the negative input/output terminal of said bridge sub-circuit, and polarized so as to allow current to flow from the negative input/output terminal of said bridge sub-circuit to the second terminal of said primary winding; a fourth bipolar transistor, the emitter of which is coupled to the second terminal of said primary winding, and the collector of which is coupled to the positive input/output terminal of said bridge sub-circuit; a fourth rectifying means interposed between the second terminal of said primary winding and the positive input/output terminal of said bridge sub-circuit, and polarized so as to allow current to flow from the second terminal of said primary winding to the positive input/output terminal of said bridge sub-circuit; a fifth bipolar transistor, the collector of which is coupled to the first terminal of said primary winding, and the emitter of which is coupled to the negative input/output terminal of said bridge sub-circuit; a fifth rectifying means interposed between the first terminal of said primary winding and the negative input/output terminal of said bridge sub-circuit, and polarized so as to allow current to flow from the negative input/output terminal of said bridge sub-circuit to the first terminal of said primary winding; a sixth bipolar transistor, the emitter of which is coupled to the first terminal of said primary winding, and the collector of which is coupled to the positive input/output terminal of said bridge sub-circuit; a sixth rectifying means interposed between the first terminal of said primary winding and the positive input/output terminal of said bridge sub-circuit, and polarized so as to allow current to flow from the first terminal of said primary winding to the positive input/output terminal of said bridge sub-circuit; a second filter capacitor coupling the positive and negative input/output terminals of said bridge sub-circuit. - View Dependent Claims (5, 6)
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Specification